Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

- Fix terminating argument to execl(3), sizeof(NULL) != sizeof(char *)
might be true on some systems [1]
- Rewrite gotos to use return directly
- Some spelling fixes
- Reduce unneeded/non-standard Makefile settings

Requested by: bde, imp [1]
Explanation provided by: bde [1]
Reviewed by: imp

Sync apmd(8) with DragonflyBSD, bringing WARNS to 3

Reviewed by: ed (partial, long time ago)

The last big commit: let usr.sbin/ use WARNS=6 by default.

Mark APM manpages as i386-only.

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

Remove GCC'isms in CFLAGS.

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Set the default manual section for usr.sbin/ to 8.

Don't forget to clean y.output. Most files generated by yacc are cleaned
automatically, but not this one.

Fixed some style bugs.

$Id$ -> $FreeBSD$

This commit was generated by cvs2svn to compensate for changes in r48730,
which included commits to RCS files with non-trunk default branches.

The apmd package provides a means of handling various APM events from
userland code. Using apmd.conf, the apmd(8) configuration file, you
can select the APM events to be handled from userland and specify the
commands for a given event, allowing APM behaviour to be configured
flexibly.

Have Fun!

Submitted by: iwasaki, KOIE Hidetaka <hide@koie.org>
Reviewed by: -hackers, -mobile and bsd-nomads ML folks.
Contributed by: Warner Losh <imp@FreeBSD.org>,
Hiroshi Yamashita <bluemoon@msj.biglobe.ne.jp>,
Yoshihiko SARUMARU <mistral@imasy.or.jp>,
Norihiro Kumagai <kuma@nk.rim.or.jp>,
NAKAGAWA Yoshihisa <nakagawa@jp.FreeBSD.org>, and
Nick Hilliard <nick@foobar.org>.